[FFmpeg-trac] #11018(ffmpeg:new): Bug: Export AAC from video file with specific duration don't give the good duration
FFmpeg
trac at avcodec.org
Wed May 22 12:37:38 EEST 2024
#11018: Bug: Export AAC from video file with specific duration don't give the good
duration
-------------------------------------+-------------------------------------
Reporter: | Owner: (none)
Imprevisible |
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: unspecified | Resolution:
Keywords: segment aac | Blocked By:
seek seeking |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by Imprevisible):
I did some tests, and I can see that only the aac and the mp3 dont have a
proper seeking. I'm doing HLS streaming, and I need to generate precise
audio files so I don't get the audio out of sync. I'm gonna try to play
all this audio files instead, but I'm not sure it will be possible
{{
AAC:
command:
ffmpeg -y -ss 00:00:00 -to 00:00:05 -i "../Téléchargements/The It Crowd
S01e01 - Yesterday's Jam.m4v" -vn test.aac
mediainfo:
General
Complete name : ../ffmpeg_test/test.aac
Format : ADTS
Format/Info : Audio Data Transport Stream
File size : 83.6 KiB
Overall bit rate mode : Variable
Audio
Format : AAC LC
Format/Info : Advanced Audio Codec Low
Complexity
Format version : Version 4
Codec ID : 2
Bit rate mode : Variable
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 83.6 KiB (100%)
MP3:
command:
ffmpeg -y -ss 00:00:00 -to 00:00:05 -i "../Téléchargements/The It Crowd
S01e01 - Yesterday's Jam.m4v" -vn test.mp3
mediainfo:
General
Complete name : ../ffmpeg_test/test.mp3
Format : MPEG Audio
File size : 79.1 KiB
Duration : 5 s 40 ms
Overall bit rate mode : Constant
Overall bit rate : 128 kb/s
Writing library : Lavf61.3.103
major_brand : mp42
minor_version : 512
compatible_brands : isomiso2mp41
Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format settings : Joint stereo
Duration : 5 s 40 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 78.8 KiB (100%)
OGG:
command:
ffmpeg -y -ss 00:00:00 -to 00:00:05 -i "../Téléchargements/The It Crowd
S01e01 - Yesterday's Jam.m4v" -vn test.ogg
mediainfo:
General
Complete name : ../ffmpeg_test/test.ogg
Format : Ogg
File size : 62.3 KiB
Duration : 5 s 0 ms
Overall bit rate mode : Variable
Overall bit rate : 102 kb/s
Writing application : Lavc61.5.104 libvorbis
creation_time : 2020-12-08T23:31:48.000000Z
handler_name : Stereo
vendor_id : [0][0][0][0]
major_brand : mp42
minor_version : 512
compatible_brands : isomiso2mp41
Audio
ID : 3624949711 (0xD81057CF)
Format : Vorbis
Format settings, Floor : 1
Duration : 5 s 0 ms
Bit rate mode : Variable
Bit rate : 112 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Compression mode : Lossy
Stream size : 68.4 KiB
Writing library : Lavf61.3.103
Language : English
WAV:
command:
ffmpeg -y -ss 00:00:00 -to 00:00:05 -i "../Téléchargements/The It Crowd
S01e01 - Yesterday's Jam.m4v" -vn test.wav
mediainfo:
General
Complete name : ../ffmpeg_test/test.wav
Format : Wave
Format settings : PcmWaveformat
File size : 938 KiB
Duration : 5 s 0 ms
Overall bit rate mode : Constant
Overall bit rate : 1 536 kb/s
Writing application : Lavf61.3.103
Audio
Format : PCM
Format settings : Little / Signed
Codec ID : 1
Duration : 5 s 0 ms
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Stream size : 938 KiB (100%)
FLAC:
command:
ffmpeg -y -ss 00:00:00 -to 00:00:05 -i "../Téléchargements/The It Crowd
S01e01 - Yesterday's Jam.m4v" -vn test.flac
mediainfo:
General
Complete name : ../ffmpeg_test/test.flac
Format : FLAC
Format/Info : Free Lossless Audio Codec
File size : 916 KiB
Duration : 5 s 0 ms
Overall bit rate mode : Variable
Overall bit rate : 1 501 kb/s
Writing application : Lavf61.3.103
major_brand : mp42
minor_version : 512
compatible_brands : isomiso2mp41
Audio
Format : FLAC
Format/Info : Free Lossless Audio Codec
Duration : 5 s 0 ms
Bit rate mode : Variable
Bit rate : 1 487 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Bit depth : 24 bits
Compression mode : Lossless
Stream size : 908 KiB (99%)
Writing library : Lavf61.3.103
MD5 of the unencoded content :
44ADFEF5FD32EBC45E5E9B71D8637F2B
}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/11018#comment:15>
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